第八周项目1——3 实现复数类中的运算符重载（实数与复数的计算）

/*
*Copyright (c) 2014,烟台大学计算机学院void change(int a[8][8]);
*All rights reserved.
*文件名称:main.cpp
*作者:苏强
*完成日期:2015年4月22日
*版本号:v1.0
*
*问题描述:利用运算符重载计算复数的计算
*/

#include<iostream>
using namespace std;
class Complex
{
public:
Complex()
{
real=0;
imag=0;
}
Complex(double r,double i)
{
real=r;
imag=i;
}
friend Complex operator+(Complex &c1,Complex &c2);
friend Complex operator-(Complex &c1,Complex &c2);
friend Complex operator*(Complex &c1,Complex &c2);
friend Complex operator/(Complex &c1,Complex &c2);
friend Complex operator+(double &i,Complex &c2);
friend Complex operator-(double &i,Complex &c2);
friend Complex operator*(double &i,Complex &c2);
friend Complex operator/(double &i,Complex &c2);
friend Complex operator+(Complex &c1,double &i);
friend Complex operator-(Complex &c1,double &i);
friend Complex operator*(Complex &c1,double &i);
friend Complex operator/(Complex &c1,double &i);
void display();
private:
double real;
double imag;
};
//下面定义成员函数
Complex operator+(Complex &c1,Complex &c2)
{
return Complex (c1.real+c2.real,c1.imag+c2.imag);
}
Complex operator-(Complex &c1,Complex &c2)
{
return Complex (c1.real-c2.real,c1.imag-c2.imag);
}
Complex operator*(Complex &c1,Complex &c2)
{
return Complex (c1.real*c2.real-c1.imag*c2.imag,c1.real*c2.imag+c1.imag*c2.real);
}
Complex operator/(Complex &c1,Complex &c2)
{
return Complex (c1.real*c2.real-c1.imag*(-c2.imag)/(c2.real*c2.real+c2.imag*c2.imag),c1.real*(-c2.imag)

+c1.imag*c2.real/(c2.real*c2.real+c2.imag*c2.imag));
}
Complex operator+(double &i,Complex &c2)
{
return Complex (i+c2.real,c2.imag);
}
Complex operator+(Complex &c1,double &i)
{
return Complex (i+c1.real,c1.imag);
}
Complex operator-(double &i,Complex &c2)
{
return Complex (i-c2.real,c2.imag);
}
Complex operator-(Complex &c1,double &i)
{
return Complex (i-c1.real,c1.imag);
}
Complex operator*(double &i,Complex &c2)
{
return Complex (i*c2.real,i*c2.imag);
}
Complex operator*(Complex &c1,double &i)
{
return Complex (i*c1.real,i*c1.imag);
}
Complex operator/(double &i,Complex &c2)
{
return Complex (i*c2.real/(c2.real*c2.real+c2.imag*c2.imag),i*c2.imag/(c2.real*c2.real+c2.imag*c2.imag));
}
Complex operator/(Complex &c1,double &i)
{
return Complex (c1.real/i,c1.imag/i);
}
void Complex::display()
{
if(imag>0)
cout<<real<<"+"<<imag<<"i"<<endl;
else
cout<<real<<imag<<"i"<<endl;
}
//下面定义用于测试的main()函数
int main()
{
Complex c1(3,4),c2(5,-10),c3;
cout<<"c1=";
c1.display();
cout<<"c2=";
c2.display();
c3=c1+c2;
cout<<"c1+c2=";
c3.display();
c3=c1-c2;
cout<<"c1-c2=";
c3.display();
c3=c1*c2;
cout<<"c1*c2=";
c3.display();
c3=c1/c2;
cout<<"c1/c2=";
c3.display();

double n=5;
cout<<"n+c2=";
c3=n+c2;
c3.display();
cout<<"c2+n=";
c3=c2+n;
c3.display();

cout<<"n-c2=";
c3=n-c2;
c3.display();
cout<<"c2-n=";
c3=c2-n;
c3.display();

cout<<"n*c2=";
c3=n*c2;
c3.display();
cout<<"c2*n=";
c3=c2*n;
c3.display();

cout<<"n/c2=";
c3=n/c2;
c3.display();
cout<<"c2/n=";
c3=c2/n;
c3.display();
return 0;
}